Double glazed 3 tracks sliding window is a high-quality window design that combines a number of advanced technologies and materials designed to provide excellent thermal and acoustic insulation as well as good ventilation. Single package size is 40X10X40 cm, single gross weight is 8.000 kg. The quality of our products is unquestionable. Our products have passed CSA certification. And our production efficiency is also very high, with a monthly output of about 20000 square meters. In general, our delivery time is within 15 days, and may be delayed if the demand is extremely large or special circumstances occur. We offer a more than five-year warranty. For the packaging methods, we choose suitable package and reinforce for the selected quantity when loading and transport. Usually air bubble film+wood packing. If you have any further questions about this product, please don’t hesitate to contact us. https://www.shaiyia.com/